The Government has always maintained that the meeting did not influence the final decision over the exemption - even though Mr Ecclestone was a major party donor at the time.

The Prime Minister appeared on the BBC's On The Record programme to insist that he was a "pretty straight kind of guy" in a bid to draw a line under the controversy. Claims that Mr Blair had "railroaded" the move past ministers were also strongly denied.

However, the briefing notes prepared by officials - and obtained by the Sunday Telegraph under freedom of information laws - raise questions about Mr Blair's account.

They reportedly show that Mr Blair instructed his chief of staff, Jonathan Powell, to signal his support for a derogation just hours after meeting Mr Ecclestone on October 16, 1997.

The following day, Downing Street wrote to public health minister Tessa Jowell stating: "The Prime Minister would like your ministers to look for ways of finding a permanent derogation for sport, in particular F1."

On October 24, Ms Jowell wrote to Mr Blair setting out possible options which included the idea of an exemption, but also contained alternatives such as a longer phase-in period for the ban.

But five days later, she received a letter insisting: "His (the Prime Minister's) view remains that we should seek to negotiate a permanent exemption for Formula 1, backed up by a voluntary agreement with the FIA."

Following the PM's response, Ms Jowell wrote to the EU - where the tobacco advertising legislation was being drafted - seeking a total exemption for Formula One.